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31. A star will compress itself into a white dwarf, a neutron star, or a black hole after it passes through a red giant stage, depending on mass.

(A) A star will compress itself into a white dwarf, a neutron star, or a black hole after it passes through a red giant stage, depending on mass.
(B) After passing through a red giant stage, depending on its mass, a star will compress itself into a white dwarf, a neutron star, or a black hole.
(C) After passing through a red giant stage, a star’s mass will determine if it compresses itself into a white dwarf, a neutron star, or a black hole.
(D) Mass determines whether a star, after passing through the red giant stage, will compress itself into a white dwarf, a neutron star, or a black hole.
(E) The mass of a star, after passing through the red giant stage, will determine whether it compresses itself into a white dwarf, a neutron star, or a black hole.

in this one, i thought answer is B. but correct one is D. please explain how ?

A is wrong because of the use of “or a black hole after it passes through a red giant stage” because here ‘it’ refers to black hole and not star.
B is wrong because it traps “depending on mass”, a critical information for correct meaning of the sentence, between two commas.
C is absurd because of “star’s mass will determine”.
E is also absurd because of the meaning that “mass will determine…”
D, although not very convincing, is the best choice here.